METEOROLOGY – HUMIDITY & WATER VAPOUR CALCULATOR
Vapour Pressure Saturation
A precise tool.
What is the Vapour Pressure Saturation & How does it work?
The saturation vapor pressure is the maximum partial pressure of water vapor that can exist in equilibrium with liquid water at a given temperature.
The Magnus formula provides an approximation for the saturation vapor pressure over water as a function of temperature. This formula is particularly useful in meteorology and climatology for calculating humidity-related parameters.
e_s = 611.2 expleft(frac{17.67 cdot T}{T + 243.5}right)
e_s = saturation vapor pressure in hPa
T = temperature in °C
T = temperature in °C
Parameters
Result
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Frequently Asked Questions
What is saturation vapor pressure?
Saturation vapor pressure is the maximum partial pressure of water vapor that can coexist with liquid water at a given temperature.
How does the Magnus formula work in this calculator?
The Magnus formula approximates the saturation vapor pressure over water as a function of temperature using the equation e_s = 611.2 exp(17.67 * T / (T + 243.5)), where e_s is in hPa and T is in °C.
Why is this formula important in meteorology?
This formula is crucial for calculating humidity-related parameters, which are essential in understanding atmospheric conditions and weather patterns.
Can I use this calculator for temperatures below freezing?
Yes, the Magnus formula can be used to calculate saturation vapor pressure for temperatures below freezing as well.
What units does the output of this calculator provide?
The output provides the saturation vapor pressure in hPa (hectopascals).
Is there a specific range of temperatures for which this formula is most accurate?
While the Magnus formula is generally accurate, it is particularly reliable for temperatures between -40°C and +60°C.
How does saturation vapor pressure affect weather conditions?
Saturation vapor pressure affects weather conditions by influencing humidity levels, which in turn impact cloud formation, precipitation, and overall atmospheric stability.
Results are for informational purposes only and do not constitute professional advice.